package com.itheima.reggie.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.itheima.reggie.dto.DishDto;
import com.itheima.reggie.entity.Dish;
import com.itheima.reggie.entity.DishFlavor;
import com.itheima.reggie.mapper.DishMapper;
import com.itheima.reggie.service.DishFlavorService;
import com.itheima.reggie.service.DishService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.List;
import java.util.stream.Collectors;

@Service
public class DishServiceImpl extends ServiceImpl<DishMapper, Dish> implements DishService {

    @Autowired
    private DishFlavorService dishFlavorService;
    /**
     * 新增菜品，同时保存对应的口味数据
     * @param dishDto
     */
    @Transactional
    public void saveWithFlavor(DishDto dishDto) {

//    ①. 保存菜品基本信息 ;
        this.save(dishDto);
//    ②. 获取保存的菜品ID ;
        Long dishDtoId = dishDto.getId();
//    ③. 获取菜品口味列表，遍历列表，为菜品口味对象属性dishId赋值;
        List<DishFlavor> flavors = dishDto.getFlavors();
//    ④. 批量保存菜品口味列表;
        flavors = flavors.stream().map((item)->{
            item.setDishId(dishDtoId);
            return item;
        }).collect(Collectors.toList());
        /*flavors.forEach(item->{
            item.setDishId(dishDtoId);
        });*/
        dishFlavorService.saveBatch(flavors);
    }

    /**
     * 根据菜品id查询菜品信息
     * @param id
     * @return
     */
    @Override
    public DishDto getByIdWithFlavor(Long id) {
        Dish dish= this.getById(id);
        DishDto dishDto = new DishDto();
        BeanUtils.copyProperties(dish,dishDto);
        LambdaQueryWrapper<DishFlavor> wrapper = new LambdaQueryWrapper<>();
        wrapper.eq(DishFlavor :: getDishId,dish.getId());
        List<DishFlavor> flavorList = dishFlavorService.list();

        dishDto.setFlavors(flavorList);
        return dishDto;
    }

    @Override
    public void updateWithFlavor(DishDto dishDto) {
        //更新dish表基本信息
        this.updateById(dishDto);
        //清理当前菜品对应口味数据---dish_flavor表的delete操作
        LambdaQueryWrapper<DishFlavor> wrapper = new LambdaQueryWrapper<>();
        wrapper.eq(DishFlavor ::getDishId,dishDto.getId());

        dishFlavorService.remove(wrapper);
        //添加当前提交过来的口味数据---dish_flavor表的insert操作
        List<DishFlavor> flavors = dishDto.getFlavors();
        flavors = flavors.stream().map((item) -> {
            item.setDishId(dishDto.getId());
            return item;
        }).collect(Collectors.toList());

        dishFlavorService.saveBatch(flavors);
    }
}
